<style>
    /*#toolBar, #toolBar tr th, #toolBar tr td {*/
        /*border: 1px solid #CCCCCC;*/
    /*}*/
    body, html {
        height: 100%;
        overflow: hidden;
        background-color: white;
    }
    .l-btn-plain:hover  {
        border:0;
        background-color: #fafafa;
    }
    #gridView>.row>div{
        border-bottom: 1px solid #CCCCCC;
        border-right: 1px solid #CCCCCC;
        padding: 0px;
    }
    #gridView>.row{
        border-left: 1px solid #CCCCCC;
    }

    #gridView>.row:first-child{
        border-top: 1px solid #CCCCCC;
    }
</style>
<div id="gridView" class="container-fluid">
    <div class="row">
        <div class="col-sm-3 col-xs-3"></div>
        <div class="col-sm-3 col-xs-3"></div>
        <div class="col-sm-3 col-xs-3"></div>
        <div class="col-sm-3 col-xs-3"></div>
    </div>
    <div class="row">
        <div class="col-sm-3 col-xs-3"></div>
        <div class="col-sm-3 col-xs-3"></div>
        <div class="col-sm-3 col-xs-3"></div>
        <div class="col-sm-3 col-xs-3"></div>
    </div>
    <div class="row">
        <div class="col-sm-3 col-xs-3"></div>
        <div class="col-sm-3 col-xs-3"></div>
        <div class="col-sm-3 col-xs-3"></div>
        <div class="col-sm-3 col-xs-3"></div>
    </div>
    <div class="row">
        <div class="col-sm-3 col-xs-3"></div>
        <div class="col-sm-3 col-xs-3"></div>
        <div class="col-sm-3 col-xs-3"></div>
        <div class="col-sm-3 col-xs-3"></div>
    </div>
</div>